Initial import from garrytan/gstack@026751e (main snapshot via local relay)

Source: https://github.com/garrytan/gstack/commit/026751e

test/upgrade-migration-v1.test.ts

@@ -0,0 +1,76 @@
+/**
+ * gstack-upgrade/migrations/v1.0.0.0.sh — writing style migration.
+ *
+ * Coverage:
+ * - Fresh state: writes the pending-prompt flag
+ * - Idempotent: second run does nothing if .writing-style-prompted exists
+ * - Pre-set explain_level: counts as answered (user already decided)
+ */
+import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import { spawnSync } from 'child_process';
+
+const ROOT = path.resolve(import.meta.dir, '..');
+const MIGRATION = path.join(ROOT, 'gstack-upgrade', 'migrations', 'v1.0.0.0.sh');
+
+let tmpHome: string;
+
+beforeEach(() => {
+  tmpHome = fs.mkdtempSync(path.join(os.tmpdir(), 'gstack-mig-test-'));
+});
+
+afterEach(() => {
+  fs.rmSync(tmpHome, { recursive: true, force: true });
+});
+
+function run(): { stdout: string; stderr: string; status: number } {
+  const res = spawnSync('bash', [MIGRATION], {
+    encoding: 'utf-8',
+    env: { ...process.env, GSTACK_HOME: tmpHome },
+  });
+  return {
+    stdout: (res.stdout ?? '').trim(),
+    stderr: (res.stderr ?? '').trim(),
+    status: res.status ?? -1,
+  };
+}
+
+describe('v1.0.0.0 upgrade migration', () => {
+  test('migration file exists and is executable', () => {
+    expect(fs.existsSync(MIGRATION)).toBe(true);
+    const stat = fs.statSync(MIGRATION);
+    // Owner execute bit should be set
+    expect(stat.mode & 0o100).toBeGreaterThan(0);
+  });
+
+  test('fresh state: writes pending-prompt flag', () => {
+    const result = run();
+    expect(result.status).toBe(0);
+    expect(fs.existsSync(path.join(tmpHome, '.writing-style-prompt-pending'))).toBe(true);
+  });
+
+  test('idempotent: second run after user answered is a no-op', () => {
+    // Simulate user answered: flag exists
+    fs.writeFileSync(path.join(tmpHome, '.writing-style-prompted'), '');
+
+    const result = run();
+    expect(result.status).toBe(0);
+    // No pending flag created
+    expect(fs.existsSync(path.join(tmpHome, '.writing-style-prompt-pending'))).toBe(false);
+  });
+
+  test('idempotent: pre-existing pending flag is not duplicated', () => {
+    // First run
+    run();
+    const firstStat = fs.statSync(path.join(tmpHome, '.writing-style-prompt-pending'));
+
+    // Second run — flag stays, no error
+    const result = run();
+    expect(result.status).toBe(0);
+    // Flag still exists; mtime may update but existence is stable
+    expect(fs.existsSync(path.join(tmpHome, '.writing-style-prompt-pending'))).toBe(true);
+    void firstStat;
+  });
+});